<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Title</title>
</head>
<body>

</body>
<script src="./index.js"></script>
<script>
	new Promise((resolve, reject) => {
		resolve(100);
	}).then(value => {
		console.log(value);// 100
		return value+10;
	}).then(value => {
		console.log(value);// 110
		return new Promise(()=>{})
	}).then(value=>{
		console.log(value);// 105
	}).catch(reason=>{
		console.log("catch",reason);
	})
</script>

</html>